1. Chromatism Testing

According to the standards, ocular estimation is the method for chromatism testing. It should be done in the natural light and not in direct sunshine. However, there are no regulations on illumination, and the testing results are varied owing to different environments. Labthink introduces PARAM SBG-80 D65/A Standard Light Source and PARAM SPS-80T Double Light Source Color Matching Desk, specializing in precise color discrimination. Their light sources are similar to the spectrum power distribution of actual sunlight. Their technical indexes can guarantee all-weather color observation and comparison, so as to avoid varied color determinations caused by different light environment.

2. The Test of Aluminum Thickness, Composite Adhesive Film Thickness and the Error

2.1 Aluminum Thickness Testing.

According to GB/T 17748-2008, take a piece from the aluminum as the specimen, an measure the aluminum thickness with the thickness tester of the .001mm(1μm) resolution. Every specimen should be measured 5 points at least, including four angles and the central part. The thickness result is the Min. average and arithmetic mean of all the measurement.

Labthink PARAM CHY-C2 Thickness Tester and PARAM CHY-CA Thickness Tester can satisfy division value requirements of the aluminum thickness precisely. Now, aluminum material is quite expensive, the precise measurement of its thickness can control the quality and reduce costs reasonably. Therefore, high precision thickness tester is the best choice for aluminum thickness measurement.

2.2 Composite Adhesive Film (macromolecule film) Thickness Testing

The thickness testing of composite adhesive film complies with GB/T 6672-2001 Plastics Film and Sheeting–Determination of Thickness by Mechanical Scanning and its relevant regulations, Labthink PARAM CHY-C2 Thickness Tester and PARAM CHY-CA Thickness Tester can also suit the composite adhesive film (macromolecule/high polymer film) thickness and thickness error measurement.

3. Coating Gloss Deviation Testing

According to GB 9754, 20 degree gloss meter should be applied to test. When testing, the testing data of more positions to the best of the operator’s ability is preferable. The difference between the maximum and the minimum values is regarded as the gloss deviation of the curtain wall aluminum-plastic composite panel. Labthink PARAM Glossmeter specializes in the rapid and accurate gloss testing of flat coating and painting surface. This instrument is portable in size, stable in quality and reliable in measurement. The resolution is 0.1 glossiness unit.

4. The Peeling Strength Testing

The peeling strength of curtain wall aluminum-plastic composite panel is of vital importance. the competence of composite strength between the aluminum panel and the plastic layer is the guarantee for future stable and reliable performance. The testing is as follows:

Peel two ends of the aluminum material to be tested, of which, cut the central plastic part and aluminum part of one peeled end. Then, clamp the remaining aluminum on the upper panel and connect with the upper clamp. Clamp the other peeled end on the roller. Keep the length axis in vertical direction with the central axis of the roller, clear zero of the tester load, and connect the lower panel with the lower clamp of the tester; set the testing speed of 25mm/min for tensile until a minimum of 150mm is peeled. Record the peeling strength and curve simultaneously. Though there are detailed regulations of specimen preparation in the standard, the specimen preparation process would affect status of the two ends of the aluminum specimen. Therefore, in order to obtain accurate data and reduce the influence of the preconditioned (pre-peeling) process to the testing results, the tester should have a function of end deletion. Labthink PARAM XLW Auto Tensile Tester specializes in the material peeling strength testing. It is of high precision, equipped with powerful software and the end deletion function, which can better suit the peeling strength testing demand of the aluminum-plastic composite panel.

Besides, PARAM Auto Tensile Tester can perform 180 degree peeling strength, roller peeling strength, tensile strength and elongation rate testing of protective film and laminated adhesive film (high polymer film) of aluminum-plastic composite panel.

5. The Tearing Strength Test of High Polymer Film Used in Aluminum-plastic Composite Panel

According to GB/T17448-2008, Aluminium-plastic composite panel for curtain wall, the tearing strength test of high polymer films is also called vertical tearing strength. Since the testing method is GB/T11999, Plastics Film and Sheeting Determination of Tear Resistance－Elmendorf Method, therefore, it’s better to be termed as Elmendorf Method Tearing Strength. Labthink PARAM Tearing Tester is the applicable tester for tearing strength testing.

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